Dual display



FIG. 1 is a front perspective view of a dual display;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top view thereof;

FIG. 7 is a bottom view thereof; and,

FIG. 8 is an exemplary diagram of a use of the dual display, in which a musical score and a keyboard are displayed on a display unit.

The broken lines in the drawings are for illustrative purpose only and form no part of the claimed design. 

CLAIM The ornamental design for a dual display, as shown and described. 